Shikaku


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Shikaku (also known as Rectangles) is a logic puzzle with simple rules and challenging solutions.

The rules are simple. You have to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the area of the rectangle.

Click and drag to draw a rectangle. To remove lines use the right mouse button or hold the Ctrl or the Shift key.

Video Tutorial
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Shikaku


5x5 Shikaku | 7x7 Shikaku | 10x10 Shikaku | 15x15 Shikaku | 20x20 Shikaku | 25x25 Shikaku

New Puzzle
This Month
1. CamPuzzle
30
 00:05.44
2. supertf
38
 00:05.83
3. Hedran
112
 00:06.37
4. Chen Jiakai
20
 00:06.40
5. oli g
29
 00:06.43
6. Whoname 00:06.70
7. hgh
69
 00:07.24
8. finnn 00:07.31
9. deathgnome
23
 00:07.35
10. elementz 00:07.86
11. Ricter 00:07.90
12. FxdeSlxyr
7
 00:07.97
13. bantz
56
 00:07.99
14. elinor0406 00:08.09
15. bigjimfridge
58
 00:08.15
16. BumbleStar
4
 00:08.20
17. User1
80
 00:08.24
18. JohannKai
37
 00:08.31
19. qobi
238
 00:08.51
20. GeorgPfleger
99
 00:08.73
This Week
1. supertf
38
 00:05.83
2. finnn 00:07.31
3. Chen Jiakai
20
 00:07.36
4. oli g
29
 00:07.49
5. Ricter 00:07.90
6. GeorgPfleger
99
 00:08.73
7. MrStark
8
 00:08.82
8. elementz 00:08.98
9. KimHeeChan
2
 00:09.15
10. Izzy777 00:09.25
11. FxdeSlxyr
7
 00:09.57
12. CroMa
95
 00:10.21
13. SunriseAR 00:10.35
14. hgh
69
 00:10.57
15. obsessica 00:11.27
16. SeatofBlack 00:11.53
17. Oryn
179
 00:12.24
18. OneaTy
24
 00:12.33
19. apte1412 00:12.94
20. boutique
6
 00:13.42
Today
1. Ricter 00:07.90
2. KimHeeChan
2
 00:09.15
3. Izzy777 00:09.25
4. elementz 00:09.88
5. GeorgPfleger
99
 00:10.83
6. SeatofBlack 00:11.53
7. apte1412 00:12.94
8. HDXX123456789 00:13.44
9. Medved 00:15.62
10. miciii3 00:19.66
11. Hellkit
8
 00:21.99
12. Suyong 00:24.04
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. zahhydude1
214
 00:03.48
2. vowels
216
 00:03.81
3. demian2
61
 00:04.66
4. Vicellen
15
 00:04.70
5. numbrr
321
 00:04.92
6. coolcoolguy65
175
 00:05.06
7. BingBongBob
108
 00:05.15
8. JZE
88
 00:05.16
9. nabi
92
 00:05.27
10. mtanzer
140
 00:05.34
AO5
1. zahhydude1
214
 00:03.76
2. vowels
216
 00:03.88
3. demian2
61
 00:04.92
4. Vicellen
15
 00:05.06
5. numbrr
321
 00:05.32
6. BingBongBob
108
 00:05.39
7. nabi
92
 00:05.41
8. coolcoolguy65
175
 00:05.44
9. bearn
206
 00:05.55
10. JZE
88
 00:05.75
AO12
1. zahhydude1
214
 00:04.20
2. vowels
216
 00:04.91
3. BingBongBob
108
 00:05.84
4. coolcoolguy65
175
 00:05.85
5. Vicellen
15
 00:06.24
6. numbrr
321
 00:06.26
7. demian2
61
 00:06.31
8. JZE
88
 00:06.39
9. bearn
206
 00:06.41
10. nabi
92
 00:06.91
Robots / programmatic solversinfo  
1.tlstyer
148
00:00.006
2.Charlie Li
61
00:00.207
3.Paul Bismuth
1
00:01.692

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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